04 April 2008
Vol 320, Issue 5872

About The Cover

Cover image expansion

COVER Single cobalt atoms (cones) on a stepped platinum substrate (blue), with attached stripes of one atomic layer of cobalt, magnetized up (yellow) or down (red), as imaged by spin-polarized scanning tunneling microscopy. Recording such images at successive magnetic fields enables measurement of the magnetic properties of individual atoms. See page 82.

Image: F. Meier et al. (illustration: F. Marczinowski)